<template>
  <div class="app-container">
    <el-form
      :model="queryParams"
      ref="queryForm"
      size="medium"
      :inline="true"
      v-show="showSearch"
      label-width="68px"
    >
      <el-form-item label="视频名称" prop="videoName">
        <el-input
          v-model="queryParams.videoName"
          placeholder="请输入视频名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="medium" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="medium" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['course:video:remove']"
        >删除</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="videoList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="视频名称" align="center" prop="videoName" :show-overflow-tooltip="true" />
      <el-table-column label="视频封面" align="center" prop="videoCover">
        <template slot-scope="scope">
          <el-image
            class="videoImg"
            :src="scope.row.videoCover"
            :preview-src-list="[scope.row.videoCover]"
          ></el-image>
        </template>
      </el-table-column>
      <el-table-column label="视频大小" align="center" prop="videoSize">
        <template slot-scope="scope">
          <span>{{byte2mb(scope.row.videoSize)}}</span>
        </template>
      </el-table-column>
      <el-table-column label="时长" align="center" prop="videoDuration">
        <template slot-scope="scope">
          <span>{{formatSecond(scope.row.videoDuration)}}</span>
        </template>
      </el-table-column>
      <el-table-column label="播放次数" align="center" prop="videoPlayCount" />
      <el-table-column label="播完次数" align="center" prop="videoFinishCount" />
      <el-table-column label="视频状态" align="center" prop="videoStatus">
        <template slot-scope="scope">
          <dict-tag :options="dict.type.video_status" :value="scope.row.videoStatus" />
        </template>
      </el-table-column>
      <el-table-column label="创建时间" align="center" prop="createTime" width="150">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.createTime, '{y}-{m}-{d} {h}:{i}') }}</span>
        </template>
      </el-table-column>
      <el-table-column label="修改时间" align="center" prop="updateTime" width="150">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.updateTime, '{y}-{m}-{d} {h}:{i}') }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['course:video:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['course:video:remove']"
          >删除</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-video-play"
            @click="handleView(scope.row)"
          >预览视频</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />
    <!-- 预览视频 -->
    <el-dialog :title="title" :visible.sync="openView" width="800px" append-to-body>
      <VideoPlayer v-if="openView" :videoInfo="videoWatch" />
    </el-dialog>
    
    <!-- 添加或修改视频对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="视频名称" prop="videoName">
          <el-input v-model="form.videoName" placeholder="请输入视频名称" />
        </el-form-item>
        <el-form-item label="视频封面" prop="videoCover">
          <image-upload v-model="form.videoCover" :fileSize="2" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button :loading="buttonLoading" type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listVideo, getVideo, delVideo, updateVideo } from "@/api/course/video";
import VideoPlayer from "@/components/VideoPlayer/index.vue";
export default {
  name: "Video",
  dicts: ["video_status", "video_is_forward"],
  components: {
    VideoPlayer
  },
  data() {
    return {
      // 按钮loading
      buttonLoading: false,
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 视频表格数据
      videoList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 视频预览
      openView: false,
      // 课程视频预览信息
      videoWatch: {
        videoUrl: "",
        videoCover: ""
      },
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        videoId: undefined,
        videoName: undefined
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        videoName: [
          { required: true, message: "视频名称不能为空", trigger: "blur" }
        ]
      }
    };
  },
  created() {
    this.getList();
  },
  methods: {
    /** 查询视频列表 */
    getList() {
      this.loading = true;
      listVideo(this.queryParams).then(response => {
        this.videoList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        videoId: undefined,
        videoName: undefined,
        videoCover: undefined
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.videoId);
      this.single = selection.length !== 1;
      this.multiple = !selection.length;
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.loading = true;
      this.reset();
      const videoId = row.videoId || this.ids;
      getVideo(videoId).then(response => {
        this.loading = false;
        this.form = response.data;
        this.open = true;
        this.title = "修改视频";
      });
    },
    /** 提交按钮 */
    submitForm() {
      console.log("上传视频", this.form);
      this.$refs["form"].validate(valid => {
        if (valid) {
          this.buttonLoading = true;
          updateVideo(this.form)
            .then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              // 跳转到第一页
              this.queryParams.pageNum = 1;
              this.getList();
            })
            .finally(() => {
              this.buttonLoading = false;
            });
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const videoIds = row.videoId || this.ids;
      this.$modal
        .confirm('是否确认删除视频编号为"' + videoIds + '"的数据项？')
        .then(() => {
          this.loading = true;
          return delVideo(videoIds);
        })
        .then(() => {
          this.loading = false;
          this.getList();
          this.$modal.msgSuccess("删除成功");
        })
        .finally(() => {
          this.loading = false;
        });
    },
    /** byte转mb */
    byte2mb(b) {
      return (b / 1024 / 1024).toFixed(2) + "MB";
    },
    /** 视频时长格式化 */
    formatSecond(s) {
      let minute = parseInt(s / 60);
      s = s % 60;
      return minute + "分" + s + "秒";
    },
    /** 预览视频 */
    handleView(row) {
      this.openView = true;
      this.title = row.videoName;
      this.videoWatch.videoUrl = row.videoUrl;
      this.videoWatch.videoCover = row.videoCover;
    }
  }
};
</script>
<style scoped>
.videoImg {
  display: block;
  margin: auto;
  width: 120px;
  height: 60px;
}
</style>